博文
JSlider用法(2005-09-18 17:22:00)
摘要：import java.awt.Color;
import javax.swing.JSlider;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Dimension;
import java.awt.GridLayout;
public class JSliderDemo
{
public static void main (String[] args)
{
JSlider empty = new JSlider ();
JSlider age = new JSlider (JSlider.VERTICAL, 0, 150, 20);//设置方向,最小值，最大值，初始值
JSlider append = new JSlider ();
append.setOrientation (JSlider.HORIZONTAL);//设置方向
append.setMinimum (0);//设置最小值
append.setMaximum (100);//设置最大值
append.setMajorTickSpacing (20);//设置主标号间隔
append.setMinorTickSpacing (5);//设置辅标号间隔
append.setPaintLabels (true);//Default:false显示标签
append.setPaintTicks (true);//Default:false显示标号
append.setPaintTrack (true);//Determines whether the track is painted on the slider
appen......
JRadioButton用法(2005-09-18 17:22:00)
摘要：import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import java.awt.Dimension;
import java.awt.Color;
import java.awt.FlowLayout;
public class JRadioButtonDemo
{
public static void main(String[] args)
{
JRadioButton red, white, cyan;
red = new JRadioButton ("red");
white = new JRadioButton ("white");
cyan = new JRadioButton ("cyan");
ButtonGroup group = new ButtonGroup ();
group.add (red);
group.add (white);
group.add (cyan);
JPanel panel = new JPanel (new FlowLayout (FlowLayout.CENTER, 1, 0));
panel.setBackground (Color.white);
panel.setPreferredSize (new Dimension (200,50));
panel.add (red);
panel.add (white);
panel.add (cyan);......
JProgressBar用法(2005-09-18 17:21:00)
摘要：import java.awt.Color;
import javax.swing.JProgressBar;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Dimension;
import java.awt.FlowLayout;
public class JProgressBarDemo
{
public static void main (String[] args)
{
JProgressBar progressBar = new JProgressBar (JProgressBar.VERTICAL, 10, 100);
progressBar.setBackground (Color.white);
progressBar.setForeground (Color.red);
progressBar.setValue (40);
progressBar.setString ("progressBar");
JPanel panel = new JPanel (new FlowLayout (FlowLayout.LEFT));
panel.setPreferredSize (new Dimension (600,400));
panel.add (progressBar);
JFrame frame = new JFrame ("JProgressBarDemo");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.setContentPane (panel);......
JOptionPane用法(2005-09-17 01:07:00)
摘要：package hu.demos;
import javax.swing.JOptionPane;
import javax.swing.ImageIcon;
import javax.swing.Icon;
public class JOptionPaneDemo
{
public static void main(String[] args)
{
Icon icon = new ImageIcon("QQ.png");
int confirmMessage;
Object[] possibleValues = {"First", "Second", "Third"};
Object inputMessage;
//-----------------------------------------------------------------
// Usage:
// method: static String/Object | showInputDialog(Xxx)
//-----------------------------------------------------------------
/*1
showInputDialog(Object message);
*/
// inputMessage = JOptionPane.showInputDialog ("Input a Integer:");
/*2
showInputDialog(Object mes......
JMenuBar用法(2005-09-17 01:01:00)
摘要：//JMenu 继承自JMenuItem，它们都在javax.swing包中，都实现了Accessible, MenuElement 接口
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import java.awt.Dimension;
import java.awt.MenuShortcut;
public class JMenuBarDemo
{
public static void main (String[] args)
{
//try{javax.swing.UIManager.setLookAndFeel(javax.swing.UIManager.getSystemLookAndFeelClassName());}catch(Exception e){}
JPanel panel = new JPanel ();
panel.setBackground (Color.white);
panel.setPreferredSize (new Dimension (600,400));
//JMenu 有箭头(除了顶层的)，可以添加JMenu和JMenuItem;
//JMenuItem 无箭头，不可添加其他菜单项
JMenu file, edit, search, item, view, format, macro, advance, windows, help;
file = new JMenu ("File");
edit = new JMenu ("Edit");
search = new ......
JList用法(2005-09-17 00:59:00)
摘要：import javax.swing.JFrame;
import javax.swing.JSplitPane;
import javax.swing.JLabel;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Color;
import javax.swing.JList;
import javax.swing.BorderFactory;
public class JListDemo
{
public static void main(String[] args)
{
String[] names = {"孙中山", "袁世凯", "毛泽东", "蒋介石", "邓小平", "天安门"};
JList list = new JList (names);
list.setBorder (BorderFactory.createEtchedBorder());
list.setFixedCellHeight (30);//设置每个选项的高度
list.setFixedCellWidth (70);//设置每个选项的宽度，一般不需要
list.setDragEnabled (true);
list.setBackground (Color.cyan);
list.setForeground (Color.red);
list.setSelectionBackground (Color.white);
list.setSelectionForeground (Color.black);
list.setLayoutOrientation (JList.HORIZONTAL_WRAP);
&......
JFrame用法(2005-09-17 00:58:00)
摘要：import java.awt.*;
import javax.swing.*;
public class JFrameDemo extends Frame
{
public static void main(String[] args)
{
JFrameDemo frame = new JFrameDemo ("My Frame");
frame.setSize(200,200);
frame.setBackground(Color.red);
frame.setLayout(null);
frame.setVisible(true);
Panel panel = new Panel();
panel.setSize(100, 100);
panel.setBackground(Color.yellow);
frame.add(panel);
//frame.show();
}
public JFrameDemo (String str)
{
super(str);
}
}......
JComboBox用法(2005-09-17 00:57:00)
摘要：//组合框的选项是对象,不一定是字符串,比如可以显示图象,但最好不要将字符串和图象混合了放在一个组合框里
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JComboBox;
import javax.swing.UIManager;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import javax.swing.ImageIcon;
public class JComboBoxDemo
{
public static void main(String[] args)
{
try {UIManager.setLookAndFeel (UIManager.getSystemLookAndFeelClassName ());}catch(Exception e){}
String[] names = {"孙中山", "袁世凯", "毛泽东", "蒋介石", "邓小平", "天安
门"};
MyBox equals = new MyBox (names);
equals.addItem ("游神");
equals.addItem ("猪头");
MyBox images = new MyBox ();
images.addItem (new ImageIcon ("Image//QQ.png"));
images.addItem (new ImageIcon ("Image//fairy.gif"));
JPanel panel = new JPanel(new FlowLayout (FlowLayout.CENTER, 0, 1));......
JColorChooser用法(2005-09-17 00:55:00)
摘要：import java.awt.Dimension;
import javax.swing.JColorChooser;
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JButton;
import java.awt.FlowLayout;
public class JColorChooserDemo implements ActionListener
{
public static void main(String[] args)
{
JFrame frame = new JFrame ("JColorChooserDemo");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
MyPanel panel = new MyPanel();
frame.getContentPane ().add (panel);
frame.pack();
frame.show();
}
public void actionPerformed(ActionEvent e)
{
}
}
class MyPanel extends JPanel implements ActionListener
{
private JButton button, rgb, red, green, blue;
private Color color = new Color (0, 0, 0);
public MyPane......
IOStream用法(2005-09-16 19:03:00)
摘要：/*
I/O流的层次
1．字节流 2．字符流 3．对象流 4．其它
详细介绍：
---------------------------------------
1．字节流：
从InputStream和OutputStream派生出来的一系列类。这类流以字节(byte)为基本处理单位。
◇ InputStream、OutputStream
◇ FileInputStream、FileOutputStream
◇ PipedInputStream、PipedOutputStream
◇ ByteArrayInputStream、ByteArrayOutputStream
◇ FilterInputStream、FilterOutputStream
◇ DataInputStream、DataOutputStream
◇ BufferedInputStream、BufferedOutputStream
---------------------------------------
InputStream 和OutputStream
InputStream 和OutputStream 是其他字节流的父类，他是一个抽象类，各有一个抽象方法：
abstract int read()和abstract write(int b);
InputStream:
◇ 从流中读取数据：
int read( ); //读取一个字节，返回值为所读的字节
int read( byte b[ ] ); //读取多个字节，放置到字节数组b中，通常
//读取的字节数量为b的长度，返回值为实际
//读取的字节的数量
......